CN100510434C

CN100510434C - Fastening element

Info

Publication number: CN100510434C
Application number: CNB2005100917609A
Authority: CN
Inventors: O·勒内; D·斯文
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2004-08-23
Filing date: 2005-08-17
Publication date: 2009-07-08
Anticipated expiration: 2025-08-17
Also published as: AU2005203344B2; TWI293666B; CN1740577A; EP1630428B1; TW200615466A; EP1630428A1; DE102004040701B3; DE502005003711D1; AU2005203344A1; AU2005203344B8; US20060041226A1; PL1630428T3; US7520710B2

Abstract

A fastening element has a head ( 14 ), a stem ( 11 ) adjoining the head ( 14 ) and having a tip at its end remote from the head ( 14 ), a first spherical section ( 21 ) extending from the tip ( 13 ) in the direction of the head ( 14 ) and a second section ( 22 ) adjoining the first section ( 21 ) and extending in the direction of the head ( 14 ), and a thread profile ( 15 ) provided on the stem ( 11 ) and having, on the second section ( 22 ), a constant steep gradient with a lead angle (beta2) from 50 DEG to 74 DEG and, on the first section ( 21 ), a gradient that increases from the lead angle (beta2) of the second section ( 22 ) toward the tip ( 13 ), with a lead angle (beta1) at a half of a length between the tip ( 13 ) and the end ( 24 ) of the first section ( 21 ) remote from the tip ( 13 ) amounting to at least 75 DEG .

Description

Fastening piece

Technical field

The present invention relates to a kind of fastening piece.

Background technique

The fastening piece of this for example nail, bolt and so on steel is applied to object is fixed on hard accepting on the material in tightening technology, as concrete, metal or rock.For this reason, fastening piece has a bar, and bar comprises one towards pinnacle and the head at the bar the other end that installation direction dwindles, and head is bigger than the diameter of bar.The setting tool that the process that is driven into for example promotes by internal combustion is by high speed impact or be driven into realization.

By the known a kind of fastening piece of DE 101 19 800 A1, it has a head and a bar that is attached thereto, and bar stops at place, a pinnacle.Here, bar has a trajectory or rouses convex first segmentation and second segmentation that is attached thereto towards cephalad direction towards pinnacle direction convergent.Ballistic first segmentation and follow-up second segmentation to small part are shaped on the profile that is designed to annular knurl (Randrierung).This profile increase rubs also thereby adds galling.

Is US 5,127,785 known a kind of nails that are used for suspension holdfast of starting point by the present invention with it, and it has a bar, and first segmentation and cylindrical second segmentation that bar is shunk towards the pinnacle direction by a bulging convex are formed.Head, that is bar has the diameter identical with the cylindrical bar section back to that end on pinnacle.On bar, establish a kind of deep screw thread profile, its constipation bundle and have only part before the pinnacle around the rear area of bar.Here, this screw thread should be used to discharge the material of being extruded by nail and be increased in the nail and matrix between friction.

These shortcomings with fastening piece of the thread groove that deep-cuts and medium steepness helical pitch are, when very fast being driven into of setting tool enforcement that for example advances by internal combustion moved, screw thread does not cause the rotation of following closely, but works as rasp, and it causes a large amount of wearing and tearing in being driven into process.This wearing and tearing reduce to follow closely the retain strength in matrix.

Summary of the invention

The objective of the invention is to overcome above-mentioned shortcoming and a kind of fastening piece is provided, it has good retention effect in hard material such as concrete or steel.

According to the present invention, a kind of fastening piece is proposed, it has a bar, bar is established a pinnacle and is established a head at the opposed the other end with it at the one end, and comprise bulging convex first segmentation, it extends from the pinnacle to the direction of head, and comprise one second segmentation, it is connected with first segmentation of drum convex towards the direction of head, and comprise the screw thread profile that is located on the bar, it is characterized by: the helical mask in second segmentation has constant, the steep helical pitch that has the helix angle in 50 ° to 74 ° scopes, and increase in the helical pitch of the first segmentation internal thread profile direction from the helix angle of second segmentation towards the pinnacle, half the length place between the opposite end of the pinnacle and first segmentation has the helix angle at least 75 °.

Therefore, be in persevering fixed steep helical pitch of screw thread profile and the helix angle in 50 ° to 74 ° scope in second segmentation between the head and first segmentation.In the helical pitch of the first segmentation internal thread profile that is connected with the pinnacle, the direction from the helix angle of second segmentation towards the pinnacle increases, and half the length place between the opposite end of the pinnacle and first segmentation has helix angle to be at least 75 °.

By this geometrical construction of profile, though make by fastening piece of the present invention the high speed that is driven into for during 50m/s (this is to occur when the setting tool that promotes by internal combustion is installed) also can screw in pedestal in and avoid thus increasing and wear and tear.Exactly cause a kind of threaded notch in matrix, it has strengthened the fixing effect of fastening piece in matrix based on better shape sealing.In metallic matrix, directly be the fastening piece of 4mm for example with bar, when on average being driven into the degree of depth and being 12mm, can reach average fixing value is 15KN.

Advantageously, the screw thread profile has at least three type grooves, preferably at least ten type grooves.Improve the rotation of fastening piece thus.For example obtained extraordinary result with fastening piece with ten to 15 type grooves.

Advantageously, the type groove is evenly distributed on the circumference of bar shaping area.Can obtain constant good fixing value thus.

In addition also advantageously, in second segmentation profile degree of depth of type groove basically (that is in machining tolerance scope) constant, and have one to be value in 0.04 to 0.15mm in number range.That is to say, in second segmentation profile degree of depth for example constant be 0.06mm.With first segmentation that second segmentation links to each other in, the profile degree of depth of type groove towards the direction on pinnacle reduce and 0.01 and 0.15mm between scope in.Therefore, if the profile degree of depth for example be 0.06mm consistently in second segmentation, then from then on the profile degree of depth in first segmentation for example is worth 0.06mm and is reduced to the minimum 0.01mm of being towards the pinnacle direction.Adopt these profile degree of depth can well rotate and only cause and find a kind of good halfway house between being driven into that energy is minimum and reducing at fastening piece.

In addition advantageously, in second segmentation profile width of type groove basically (that is in machining tolerance scope) constant, and have one number range be 0.1 and 0.8mm between value.Therefore profile width or groove width for example are 0.5mm consistently in second segmentation.Advantageously, in first segmentation profile width of type groove towards the pinnacle direction reduce and 0.8 and 0.05mm between scope in.Therefore, if the profile width for example be steady state value 0.5mm in second segmentation, then from then on the profile width in first segmentation for example is worth 0.5mm and is reduced to the minimum 0.2mm of being towards the pinnacle direction.These profile width are equally at the high rotate effect that has strengthened fastening piece when being driven into speed.

Description of drawings

Provide other advantages of the present invention and measure by following explanation and accompanying drawing.By an embodiment the present invention is described in the accompanying drawings.Wherein:

Fig. 1 is by fastening piece side view of the present invention;

Fig. 2 presses the fastening piece sectional drawing of Fig. 1 center line II-II;

Fig. 3 presses the fastening piece sectional drawing of Fig. 1 center line III-III.

Embodiment

Fastening piece 10. these fastening pieces 10 that Fig. 1 to 3 expression is designed to follow closely have a head 14, bar that is attached thereto 11 and one on bar 11 and pinnacles 13 head 14 opposite ends.Bar 11 has two segmentations, i.e. bulging convex first segmentation 21, it directly links to each other with pinnacle 13, and one second segmentation 22, and here it is designed to cylindrical basically and extends to head 14 from first segmentation 21 with 13 opposed those ends 24, pinnacle always.One of second segmentation 22 with first segmentation, 21 adjacent areas on establish a screw thread profile 15, it extends to first segmentation 21 always.Here, screw thread profile 15 has 12 type grooves 16 in the present embodiment.Screw thread profile 15 has constant steep helical pitch and helixangle in the zone of second segmentation 22 ₂It is 60 °.Wherein β is by tan β=P _n/ (π d) determines, P in the formula _nThe diameter of the helical pitch of=screw thread profile and d=fastening piece 10.In the zone of

first segmentation

21,13 direction increases towards the pinnacle for helical pitch and helixangle.For example be in a some place on half length 17 between the end 24 of first segmentation 21 and the pinnacle 13, helixangle ₁Greater than 75 °.In the present embodiment, profile extends to the pinnacle always, and the almost coaxial longitudinal length in fastening piece 10 of profile extends ground and is provided with in first segmentation 21 faces the forward region 23 on pinnacle 13.Should mention that also this forward region 23 also can be designed as does not have profile.

In the zone of second segmentation 22, it is 0.06mm that the type groove 16 of screw thread profile 15 has the dark or groove depth t of constant profile, and constant groove width b is 0.5mm, and the diameter of second segmentation 22 this moment is 4mm.In first segmentation 21, the dark or groove depth t of profile is reduced to 0.01mm in 13 zones, pinnacle from the 0.06mm in end 24.Groove width b is reduced to 0.2mm in 13 zones, pinnacle from the 0.5mm in the beginning of end 24 equally.

Claims

1. fastening piece, it has a bar (11), bar is established a pinnacle (13) and is established a head (14) at the opposed the other end with it at the one end, and comprise bulging convex first segmentation (21), it from the pinnacle (13) extend to the direction of head (14), and comprise one second segmentation (22), it is connected with drum convex first segmentation (21) towards the direction of head (14), and comprise the screw thread profile (15) that is located on the bar (11), it is characterized by: the screw thread profile (15) in second segmentation (22) has constant, have the helix angle (β in 50 ° to 74 ° scopes ₂) steep helical pitch, and at the helical pitch of first segmentation (21) internal thread profile (15) helix angle (β from second segmentation (22) ₂) direction of set out towards the pinnacle (13) increases, half length (17) between the opposite end (24) of pinnacle (13) and first segmentation (21) locates to have the helix angle (β at least 75 ° ₁).

2. according to the described fastening piece of claim 1, it is characterized by: screw thread profile (15) has at least three type grooves (16).

3. according to the described fastening piece of claim 1, it is characterized by: screw thread profile (15) has at least ten type grooves (16).

4. according to claim 2 or 3 described fastening pieces, it is characterized by: type groove (16) is evenly distributed on the circumference of bar (11) shaping area.

5. according to claim 2 or 3 described fastening pieces, it is characterized by: the profile degree of depth (t) of the type groove (16) in second segmentation (22) is constant basically and to have one be value in 0.04 to 0.15mm in number range.

6. according to the described fastening piece of claim 5, it is characterized by: in first segmentation (21) the profile degree of depth (t) of type groove (16) towards the direction of pinnacle (13) reduce and 0.01 and 0.15mm between scope in.

7. according to claim 2 or 3 described fastening pieces, it is characterized by: in second segmentation (22) the profile width (b) of type groove (16) constant basically and have one number range be 0.1 and 0.8mm between value.

8. according to the described fastening piece of claim 7, it is characterized by; In first segmentation (21) the profile width (b) of type groove (16) towards the pinnacle direction reduce and 0.8 and 0.05mm between scope in.